Mechanical movement



(No Model.)

I G.DUNHAM. MEGHANIGAL MOVEMENT. I I No. 376,769. v Patented Jan. 24:, 1888,

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UNITED ST T S PATE T OEEIcE,

GEORGE DUNHAM, 0 UNIoNvILnE, CONNECTICUT.

MECHANICAL MOVEMENT.

SPECIFICATION, forming part of Letters Patent No. 376,769, dated January 24,1888. Application filed June 13, 1887. Serial No. 24!,158. (No model.)

To all whom it may concern:

Be it known that I, GEo GE DUNHAM, a citizen of the United States, residing at Unionville, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specification.

The object of my invention is to provide a simple and efficient means for transmitting power-as, for instance, from a-driving-shaft to a reciprocating bar which is parallel to said drivingshaft.

In the accompanying drawings, Figure l is a plan view of my mechanical movement with the holding-cap removed. Fig. 2 is a side elevation of the same with the holding-cap in place, and Fig. 3 is a front elevation thereof.

A represents a cam-pulley on the shaft B. The cams G and D are placed in such relation to each other as to bear alternately against one end of twoslides, E F, which are arranged to movein ways, as shown. The opposite ends of these slides E F are beveled, with the bevels facing each other, so as to bear on the opposite sides of a projection on the sliding bar H, which projection is preferably in the form of a friction pulley or roller, G, pivoted to said bar. It will be seen that a movement of slide E, acted upon by the cam D on shaft B,

moves the'sliding bar H to the right, while at the same time the roller G bears upon the bevel of the slide F and pushes it back towardthe cam'O. The corresponding move ment of slide F'throws the sliding'bar H the same distance to theleft', and likewise returns The distance of the movement the slide E. of the sliding bar may be regulated and limited by the size of the several cams and pulleys.

\ ,40 'While I have used the words slidingbar to designate the part H, I lay no. stress upon fl said part being in the form of a,bar.. Asliding bar or frame of any form propelled by the j p 45,

projection, the slides E F, having beveled ends bearing against said projection, thecams O D, and their driving-shaft, substantially as described, and for the-purpose specified.

GEoEGE DUNHAM.

Witnesses:

GEORGE E. TAFT, GEORGE MIDUN-HAM. 

